Composition for removing scale

Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...

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134 2213, 134 2214, 134 2217, 134 2219, 134 251, 134 41, 210698, 252 82, 252180, C23G 106

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active

056859180

ABSTRACT:
Alkaline earth metal scales, particularly barium sulfate and strontium sulfate, and silica-based scales, particularly potassium fluorosilicate, are removed from industrial processing equipment, tubular goods, and other scaled materials with a composition comprising sufficient potassium base to provide an overall system pH of between about 12.0 to about 14.0, a polyaminocarboxylic acid, preferably EDTA, a hydroxycarboxylic acid synergist, a pH buffering agent, a wetting agent, and optionally a sodium base.

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